The 28-year-old wore a Whistles dress and black knee-high boots to attend the Commonwealth Youth Forum in London on Wednesday. (Photo: Getty Images)

Princess Eugenie was beaming as she arrived at the event in London, wearing a day dress by the brand Whistles.

She matched the floral dress with a pair of black knee-high boots by Isabel Marant, which left many wondering if her outfit was appropriate for such a formal occasion.

The arguments from people online range from those who think the dress was too short to others who mocked the boots.

I like Eugenie – I really do, but with all the talk of Meghans outfit not being appropriate at the commonwealth event today, is anybody going to comment on the inappropriateness here???! pic.twitter.com/D0s0rJtEWd